4D seismic time-lapse monitoring of an active cold vent, northern Cascadia margin

Riedel, Michael

doi:10.1007/s11001-007-9037-2

Cited by 24 publications

(18 citation statements)

References 22 publications

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“…In the recent past, 3D seismic data became an increasingly important tool for studies of geofluids (Bünz et al, 2005a;Gay et al, 2007Gay et al, , 2006Hornbach et al, 2008;Hustoft et al, 2007;Purdy et al, 2008;Riedel, 2007;Sultan et al, 2007). However, 3D seismic research studies are mostly limited to areas of hydrocarbon exploration.…”

Section: Introductionmentioning

confidence: 99%

High-resolution P-Cable 3D seismic imaging of gas chimney structures in gas hydrated sediments of an Arctic sediment drift

Petersen

Bünz

Hustoft

et al. 2010

Marine and Petroleum Geology

151

150

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Section: Introductionmentioning

confidence: 99%

High-resolution P-Cable 3D seismic imaging of gas chimney structures in gas hydrated sediments of an Arctic sediment drift

Petersen

Bünz

Hustoft

et al. 2010

Marine and Petroleum Geology

151

150

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“…The intent of 4-D processing is to attenuate the 4-D "noise" caused by changes in acquisition parameters or environmental conditions, and to emphasize the 4-D signature of the reservoir caused by changes in fluid, pressure and stress. A standard seismic processing technique in 4-D time-lapse monitoring is known as cross-equalization (Eastwood et al, 1998;Harris and Henry, 1998;Naess, 2006;Gan et al, 2004;Riedel, 2007). Essentially, the cross-equalization process allows the user to perform a time-lapse seismic monitoring by removing differences in:…”

Section: Time-lapse Seismic Monitoringmentioning

confidence: 99%

“…depleted hydrocarbon reservoirs). The main purpose of the 4-D seismic cross-equalization then, is to reduce differences in areas with no expected changes and to optimize differences in areas where changes have occurred (Riedel, 2007).…”

Section: Time-lapse Seismic Monitoringmentioning

confidence: 99%

“…Riedel (2007) has demonstrated that temporal changes in sub-surface anomalies over a time-span of 5 years, interpreted as seafloor hydrocarbon venting episodes from underlying gas hydrates, were clearly detectable using 4D seismic imaging at Bullseye Vent (offshore Vancouver Island). Similarly, Bangs et al (2011) showed a scenario for the South Hydrate Ridge (offshore Oregon) where temporal changes in hydrocarbon anomalies within a time interval of 8 years were noticed through time-lapse seismic monitoring.…”

Section: Introductionmentioning

confidence: 99%

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Hydrate research activities that both support and derive from the monitoring station/sea-floor Observatory, Mississippi Canyon 118, northern Gulf of Mexico

Lutken

2013

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“…Dense surveys conducted by academia are few: these include the vicinity of IODP drilling sites, for instance on the Blake ridge (Hornbach et al, 2008), or on the Cascadia (e.g. Ganguly et al, 2000;Hobro et al, 2005;He et al, 2007;Riedel, 2007) and Nankai (e.g. Martin et al, 2004;Bangs et al, 2010) margins, as well as combined seismic reflection/refraction experiments conducted in the North Sea (e.g.…”

Section: Introductionmentioning

confidence: 99%

Structural controls on the formation of BSR over a diapiric anticline from a dense MCS survey offshore southwestern Taiwan

Schnürle¹,

Liu²,

Lin³

et al. 2011

Marine and Petroleum Geology

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a b s t r a c tA dense seismic reflection survey with up to 250-m line-spacing has been conducted in a 15 Â 15 km wide area offshore southwestern Taiwan where Bottom Simulating Reflector is highly concentrated and geochemical signals for the presence of gas hydrate are strong. A complex interplay between northesouth trending thrust faults and northwestesoutheast oblique ramps exists in this region, leading to the formation of 3 plunging anticlines arranged in a relay pattern. Landward in the slope basin, a northesouth trending diapiric fold, accompanied by bright reflections and numerous diffractions on the seismic profiles, extends across the entire survey area. This fold is bounded to the west by a minor east-verging back-thrust and assumes a symmetric shape, except at the northern and southern edges of this area, where it actively overrides the anticlines along a west-verging thrust, forming a duplex structure. A clear BSR is observed along 67% of the acquired profiles. The BSR is almost continuous in the slope basin but poorly imaged near the crest of the anticlines. Local geothermal gradient values estimated from BSR sub-bottom depths are low along the western limb and crest of the anticlines ranging from 40 to 50 C/km, increase toward 50e60 C/km in the slope basin and 55e65 C/km along the diapiric fold, and reach maximum values of 70 C/km at the southern tip of the Good Weather Ridge. Furthermore, the local dips of BSR and sedimentary strata that crosscut the BSR at intersections of any 2 seismic profiles have been computed. The stratigraphic dips indicated a dominant eastewest shortening in the study area, but strata near the crest of the plunging anticlines generally strike to southwest almost perpendicular to the direction of plate convergence. The intensity of the estimated bedding-guided fluid and gas flux into the hydrate stability zone is weaker than 2 in the slope basin and the south-central half of the diapiric fold, increases to 7 in the northern half of the diapiric fold and plunging anticlines, and reaches a maximum of 16 at the western frontal thrust system. Rapid sedimentation, active tectonics and fluid migration paths with significant dissolved gas content impact on the mechanism for BSR formation and gas hydrate accumulation. As we begin to integrate the results from these studies, we are able to outline the regional variations, and discuss the importance of structural controls in the mechanisms leading to the gas hydrate emplacements.

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4D seismic time-lapse monitoring of an active cold vent, northern Cascadia margin

Cited by 24 publications

References 22 publications

High-resolution P-Cable 3D seismic imaging of gas chimney structures in gas hydrated sediments of an Arctic sediment drift

High-resolution P-Cable 3D seismic imaging of gas chimney structures in gas hydrated sediments of an Arctic sediment drift

Hydrate research activities that both support and derive from the monitoring station/sea-floor Observatory, Mississippi Canyon 118, northern Gulf of Mexico

Structural controls on the formation of BSR over a diapiric anticline from a dense MCS survey offshore southwestern Taiwan

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